options ps=54 ls=76; FILENAME website HTTP "http://www.stat.ufl.edu/~winner/data/webworm1.dat"; data one; infile website; input trt wwcount trt2dum trt3dum trt4dum; run; proc genmod; by trt; model wwcount = /dist=poi link=log; run; proc genmod; by trt; model wwcount = /dist=negbin link=log; run; quit;